Grain-drill.



W. J. DOBBIN.

Patented No'v. I8,` |902.

E R AIN D R I L L.

(Application filed Jan. 20, 1902.)

2 Sheets-Sheet l.

(No Mandel.)

Witnesses:

Attorneys No. 713,616. y

W.`J. DUBBIN. GRAIN nmLL.

( Appicaton led Jau. 20, 1902.)

Patented Nov. I8z 1902.

2 Sheets-Sheet 2,

Y (No Model.)

Witnesses:

Attorneys STnTEs FATENT OEEICE.

WILLIAM JAMES DOBBIN, OF MORRIS, CANADA, ASSIGNOR OF ONE-HALF TO JAMESM. HAOKNEY, OF MORRIS, MANITOBA, CANADA.

GRAIN-DRILL.

Application filed January Z0, 1902. Serial No. 90,432. (No model.)

o cl/ZZ whom, t may concern.-

Be it known that I, WILLIAM JAMES Don- BIN, a subject of the King ofGreat Britain, residing at Morris, county of Morris, Province ofManitoba, Canada, have invented certain new and useful Improvements inGrain-Drills; and I do hereby declare that the following is a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to improvements in grain-drills; and among otherobjects I have in view the following, which are mentioned as the mostimportant, viz: to provide a single iiat disk with a rim adapted toproduce a deep and well-defined furrow in the soil, to provide animproved form of grain tube which occupies a compact relation to arunway of the rimmed disk and is thereby adapted to discharge theseed-grain to said disk in a manner which insures its lodgment in thefurrow below the surface of the soil, to provide means for positivelydischarging any grain which may have a tendency to lodge in the runwayof the disk, and to provide means for scraping both faces of the diskfrom accumulations of soil.

With these ends in View the invention consists in the novel combination,construction, and arrangement of parts, which will be hereinafter fullydescribed and claimed.

In the drawings hereto annexed, forming a part of this specification,Figure l is an end elevation of a part of a grain-drill having myimprovements applied thereto. Fig. 2 is an enlarged side elevationshowing the improved disk, the graintube, and the scraper. Fig. 3 is avertical cross-section on the line 3 3 of Fig. 2. Fig. A is a top planview of the parts shown by Fig. 2. Fig. 5 is a horizontal section on theline 5 5 of Fig. 2. Fig. 6 is a detail perspective view of the improvedgraintube. Fig. 7 is a view in edge elevation of the grain-tube shown byFig. 6. Fig. S is a detail view showing the means for supporting andoperating the Scrapers adapted to keep the faces of the disk free fromaccumulations of soil. Fig. 9 is a snpportingbar for the Scrapers ofFig. S. Fig. l0 is an enlarged sectional view through the hub of therotary disk. Figs. l1, l2, 13, 14, and l5 are crosssectional viewsthrough different forms of the revoluble disk. Fig. 16 is a fragmentarydetail view of the revoluble disk and of a dragbar, showing one form ofthe grain-ejector or scraper. Fig. 17 is a side view of another form ofthe grain-ejector or scraper disconnected from the disk. Fig. 18 is aplan view of the part shown by Fig. 17. Fig. 19 is ano other fragmentaryside view of a portion of the disk, a drag-bar, and the spout of thegrain-tube, said view showing still another form of the grain-ejector orscraper.

The same numerals of reference denote like parts in all the figures ofthe drawings.

In Figs. l, 5 designates the axle, on which is mounted the usualcarrying-wheels, one of which is designated at 6. The frame supports theseedbox or hopper 8, and to this 7o frame are connected the drag-bars 9.Depending from the rear portion of the frame is a series of flexibletubes or pieces of hose, (indicated at 10.) With each drag-bar 9 isassociated a pressure-rod ll, which confines a spring l2, that exertsits energy upon the dragbar and serves to normally depress the latterand to thereby force the disk into the ground. All these parts are ormay be of the usual construction, and as no novelty therefor is 8oclaimed in this application I reserve the right to employ any preferredconstruction. One of the features of the present invention is arevoluble disk 13, the same being formed or provided with a rim 14 andthe whole adapted 85 to form a deep and sharply-defined furrow in thesoil. I am aware that it is customary to employ a pair ofreversely-inclined disks and to support said pair of disks on a singledrag bar; but I have simplified this construction 9o by dispensing withone disk of the pair and by modifying the construction of the singledisk which is retained, whereby each disk is mounted or journaledindividually in its proper drag-bar. The disk consists of a Hat circularplate of steel or other preferred material of the proper dimensions andproporu tions, and this disk is revolubly mounted in thedownwardly-inclined rear ends of the members forming the drag-bar 9through the roo medium of the bolt or axle 15. (See Fig. IO.) To thecenter of the disk and on opposite sides ot the latter are applied themembers 16 17, forming the disk-hub, and these two members are unitedsolidly to the disk by the rivets 18. The members of the hub are formedwith the oppositely-extending bearing-cones 19 and with the annularcollars or flanges 20. The bearing-cups 21 22 are fitted against theinner sides of the members forming the dragbar 9, said cups havingconical openings arranged to receive the male bearing-cones 19 on themembers of the hub. The bolt or axle 15 passes through the members ofthe dragbar, the bearing-cups, the members of the hub, and the disk, andthese parts are held in proper relation by the nuts 23. The end portionsof the bearing-c u ps are housed within the annular collars 20, whichare provided on the members of the hub, thus excluding sand from thebearing of the revoluble disk. I reserve the right to modify or changethe construction of the means whereby the revoluble disk may be mountedin the drag-bar.

The rim 14 may be made an integral part of the revoluble disk, as shownby Figs. 3 and 5 and by Figs. 11 to 15, inclusive; but it will beevident to the skilled mechanic that this rim may be made in a separatepiece of metal and united in any approved way to the disk. The rim mayhave a flat outer face 13a in the plane of one face of the disk; but theopposite face of the disk is necessarily inclined, as indicated at 24,such inclined face being joined to the opposite face of the disk by anannular face 25, which forms a circular runway for the grain on theinner face of the single disk 13. This annular face 25 is shown by Figs.3, 5, and 11 as lying in a plane at right angles to the faces of thedisk 13 and parallel to the axis thereof; but the cross-sectionalcontour of the rim may be modified, as shown by Figs. 11 to 15,inclusive. For example, the outer face 26 of the rim may be inclined orbeveled, as shown by Fig. 11, while the faces 24 and 25 remain the sameas in Figs. 3 and 5. The outer face 13"' of the rim shown by Fig. 12 maylie in the plane of the outer face of the disk, while the inner face 24of the rim may be inclined, as in Figs. 3, 5, and 11; but the annularface or shoulder of the rim may be inclined, as at 27, so as to meet theface 24 at an obtuse angle. In Fig. 13 I have illustrated the style ofthe rim which combines the inclined outer face 26 and the inclined innerface 24 of the rims shown by Fig. 11 with the inclined shoulderorannular face 27 shown by Fig. 12. In Fig. 14 the rim has the datstraight outer face 13-, the beveled inner face 24, and the annular faceor shoulder is made concave in crosssection, as at 2S. In Fig. 15 I haveshown the concave shoulder or face 28 of Fig. 14 combined in a rim whichhas the beveled outer face 26 and the beveled inner face 24.

29 designates a grain-tube which is circular at its upper portion and isadapted to receive the lower extremity of the flexible tube or piece ofhose 10. This grain-tube may be supported in the machine by any suitablemeans; but, as shown by Figs. 1 and 2, the grain-tube is attached, as at30, to a member ofthe drag-bar 9. A peculiarity of this graintubeconsists in the formation of a fiat curved spoilt 31 at the lowerportion thereof. (See Figs. 1, 2, 6, and 7.) The iiattened spout 31forms an integral part of the cross-sectionally circular grain tube 29,although the spout may be made separate from the graintube and united ina suitable way therewith. The spout 31 is open on one side and at oneedge, said spout being formed by a plate 3ln and a flange 31", as shownmore clearly by Figs. 6 and 7. Furthermore, the radius of the curvedspout conforms to the rim 14 0n the revoluble disk, and, as shown byFig. 3, the fiattened spout and the circular tube are joined by aninclined or oset shank 32.

This construction enables the flattened and Y curved spout to be broughtinto substantially close relation laterally with respect to the disk 13and with relation to the annular face or shoulder of the rim 14, wherebythe disk is adapted to close the open side of the spout, and theshoulder of the rim performs a like office for the open edge of thespout, as shown more clearly by Figs. 3 and 5. From this description itis evident that the stationary grain-tube, which is mounted or supportedon the drag-bar, is disposed in coperative relation to the revolubledisk and its enlarged beveled rim, so that the annular face or shoulderof the beveled rim assists in the formation of a runway, into which theseed is dis` charged from the seedbox 8 by the flexible tube 10 and thegrain-tube. Ihe flattened and curved spout which extends downwardly fromthe stationary grain-tube terminates in a beveled lower edge 33, that isadapted to form a free and uninterrupted discharge-port through whichthe grain is free to escape.

Under some conditions of service of the grain-drill it is found that thcseed-grain has a tendency tolodge against the annular face or shoulderof the rimmed disk; but I overcome this objection by the provision of anejector or scraper, diderent forms of which are shown by Figs. 1, 2, 16,17, 18, and 19. This scraper lies in rear of the discharge end of theflattened and curved spout 31, and it is disposed in close relation tothe face of the disk and to the inner shoulder of the rim. This ejector34 has a curved edge 35, that is disposed concentric with the shoulderof the rimmed disk, and, as shown by the drawings, the front edge 36 ofthe ejector' is inclined, so that it may occupy a divergent relation tothe end 33 of the curved spout, thereby providing ample space betweenthe ejector and the spout for the escape of the seed. The ejector-platemay be supported in stationary relation to the revoluble disk by anysuit able means. As shown by Fig. 2, the ejectorplate has an arm 37,which is fastened to the top edge of the fiattened curved spout 3l; but,if desired, this ejector-plate may IOC IIO

be attached to an extension 38 of one member of the drag-bar, as shownby Figs. 16 and 19, or any other means may be resorted to for supportingthe ejector-plate. As shown by the plan View Fig. 17, the ejector-platelies at an angle to the shank 37 thereof, and it therefore follows thatsaid ejector-plate does not lie in a parallel relation to the inner faceof the revoluble disk; but, on the contrary, the ejector-plate lies atan angle or diagonally to the plane of the disk. This construction makesthe inclined or diagonal ejector-plate extend across the annular face orshoulder of the rim on the disk, and the rear end of this ejector-platethus terminates at or beyond the inner edge of the rim which is formedby the beveled face 24 and the annular face or shoulder. It follows fromthis construction and arrangement that the ejectorplate serves topositively scrape any seed which may lodge upon the shoulder or annularface of the rimmed disk, thereby discharging the grain with a force-feedaction and insuring the proper deposit of the seed into the furrow andbelow the soil.

To more effectually discharge the grain from the rimmed disk and intothe furrow, I may provide the ejector-plate with a downwardly-extendingtailpiece 39, as shown by Fig. 17, said tailpiece adapt-ed to scrapeagainst the beveled edge or face 24 of the rim. Furthermore, instead ofmaking the tailpiece narrow, as shown by Fig. 17, the ejector-plate 34,which is shown by Fig. 19, may have a wide flange or tailpiece 40, thesame adapted to scrape against the beveled face of the revoluble disk.

Another improvement which I have made consists in the employment ofScrapers 41 42, disposed in operative relation to the two faces of therevoluble disk. (See Figs. l, 2, 4, and 8.) These scrapers are in theform of tapered blades or plates, which are secured to theinwardly-extending arms 43 of a pair of levers 44, the latter beingfulcrumed to the end portions of a supportingbar 45, that is secured tothe grain-tube 29, although other means may be resorted to for thesupport of the scraper-carrying levers. The levers are arranged. ininclined positions, as shown by Figs. 1 and 2, and each lever isfulcrumed at a point intermediate of its length by a suitable piu orbolt that is attached to one end of the supporting-bar 45. A guide-stem46 is secured to one lever 44 and arranged to play in an opening of theother companion lever, (see Fig. 8,) and on this stem is loosely fitteda coiled pressure-spring 47, that acts against both of the levers andhas a tendency to normally force the reversely-iuclined scrapers 41 42normally into engagement with both faces of the disk. As shown by Fig.2, the Scrapers engage with the upper portion of the disk and within therim 14 thereof; but it is evident that the Scrapers may be arranged inany desired way and adapted to engage with other portions of the diskfor the purpose of keeping both faces thereof clean and free fromaccumulations of soil.

It is thought that the operation and advantages of my invention will bereadily understood from the foregoing description taken in connectionwith the drawings.

Changes within the scope of the appended claims maybe made in the formand proportion of some of the parts while their essential features areretained and the spirit ot' the invention is embodied. Hence I do notdesire to be limited to the precise form of all the parts as shown,reserving the right to vary therefrom.

Having thus described inyinvention, what I claim as new is- 1. In agrain-drill, the combination of a revoluble disk provided with a beveledrim forming an annular face or shoulder and a graintube having its lowerdelivery end concentric with said rim, and disposed entirely within thethickness thereof to occupy a compact relation to the disk and its rim,substantially as described.

2. In agrain-drill, a revoluble disk provided with a beveled rim havingan annular curved shoulder or face, and a grain-tube having its lowerend curved and disposed concentric to and entirely within the thicknessof said rim, substantially as described.

3. In a grain-drill, the combination of a rev'- oluble disk providedwith a rim, of a graintube which terminates in a iiattened or curvedspout, the same being disposed entirely within the thickness of said rimand having a cooperative relation to the disk and its rim, substantiallyas described.

4. In a grain-drill, a grain-tube having a flattened spout which issubstantially L.- shaped in cross-section being open on one side and atone edge, substantially as and for the purposes described.

5. In a grain-drill, a grain-tube having a flattened curved spout whichis open at one side and on one edge, combined with a disk provided witha rim, said parts being disposed in mutual cooperative relation with thespout entirely within the thickness of the rim for the disk and its rimto close the open side and edge of the spout, substantially asdescribed.

6. In a grain-drill, the combination with a disk and a grain-tube havingits lower end curved concentric with and disposed within the thicknessof the disk, of an ejector disposed within the thickness of the disk andhaving an operative relation to the disk and adjacent to the deliveryend of the spout, substantially as described.

7. In a grain-drill, the combination with a disk and a grain-spout, ofan ejector-plate disposed within the thickness of the disk and occupyinga diagonal relation to arim of the disk, substantially as described.

8. In a grain-drill, the combination of a disk provided with a rim, agrain-spout, having curved lower end within the thickness of the disk,and a relatively stationary ejector-plate IOO IIO

disposed Within the thickness ot the disk in operative relation to therixn and having a tailpiece arranged to sweep the face of the rim,substantially as described.

9. In a grain-drill, the combination with a grain-tube and a revolubledisk, of a xed lever-supporting bar, a pair of levers fulcrurned to theend portions of the bar, oppositely-inclined Scrapers attachedindividually to the levers, a guide-stem attached to onel lever andhaving slidable relation to the other lever, and a pressure-springacting against both levers and tending to normally hold thescraper-blades in active engagement With the faces of the revolubledisk, substantially as described.

l0. In a grain-drill, the combination with a rimmed disk, and agrain-tube having a dat WILLIAM JAMES DOBBIN.

Nitne'ssesz J. F. PRINGLE, G. F. IRVING.

